Reversing-switch.



No. 875,900. PATENTED JAN. 7, 1908.

A. 0'. EASTWOOD. REVERSING SWITCH.

APPLICATION FILED APR. 19, 1906.

INVENTOR UNITED STATES hltll;lUB CJEASTWOOD, OF CLEVELAND, OHIO.

REVERSING-SWITCH.

N0. 875,230il Specification of Letters latent,

Patented Jan. '7', 1908.

Application filed April 19 1906. lilerial No. 312.613.

To all whom it may concern:

Be it known that .l, ARTHUR O. EASTW'DOD, citizen of the United States, residing at o Cleveland, in the county of Cuyahoga and tats of Ohio, have invented or discovered cw and useful improvements in Reversing- Switches, of which the following is a speciii cation. I i

My invention relates to a new and improvd io'rrn of reversing switch, which may be advantageously used for reversing the direction of current flow through one of the elements of an electric motor, thereby re versing the direction of rotation cl its armature, and which may be also employed with advantage for reversing the direction of ourrcntilow through other forms of translating devices.

The objects duce a reversing switch, which will be ex treincly simple in construction and operation; which will be so arranged that all of the switch members will be active when. controlling the How of current in either direction through the translating device in connection with which the reversing switch may be used; which will have movable member of small inertia; in which parts differing in potential will be thoroughly insulated from one another; in which the various parts will. be accessible for ins 'iection and repair.

Referring to the accompanying drawings whiclii illustrate a preferable form of my invei'ition, Figure l is a top plan view; Fig. 2,

a side elevation, showing in section one. of the operating clectro-inagnets; Fig. 3, a vertical section through the central shaft and contact rings, portions being broken away; and i, a diagram of the wiring for my switch.

(in the drawings, l F F and F are groups of relatively stationary contact fin gers, each group in. the switch being made up of preferably a plurality of fingers, as shown in l 2. The lingers in each group are carried. in a metallic finger holder f which is provided with a terminal lug g and two set-screws g for receiving a connecting wire, and provided with eyes f, between which are pivoted the contact fingers carried upon a pin 9 passing through the two eves The contact fingers are each provide with an. extension 9 at their outer ends, throughwhich passes an adjusting screw f provided at its cl my invention are to pro- 1 outer end with a nut f The groups oi contactfingers are arranged approximately 90 apart'. Spiral springs f press the fingers outward producing a yielding contact with the contact rings which cooperate with the lingers. It will be seen that the nut f 4 limits the motion of the contact fingers toward the axis of the rings. v The finger holders together with the contact fingers, which they carry, are mounted upon two plates D and D of insulating material, parallel with each other and with the shaft S, which carries the rotatable member of the reversing switch. The insulating plates D and l) are carried by projecting lugs B and B which project from the iron framework ll of the switch, and are preferably made cl slate and so constructed that they aliord excellent insulation between the various groups of contact lingers, at the same time serving to support the finger holders rigidly.

Two contact rings R and R? are carried by the central shaft S, the periphery of these rings cooperating, as the shaft is revolved, with the contact lingers F F F and F hese rings are light in construction, as illustrated in the drawings, each being made up of a central hub which surrounds an insulating sleeve 5 on the shaft S and is provided with spokes supporting a rim which forms the contact surface of the ring.

As will be seen in Fig. 3, the peripheral face of one of the rings projects downward with reference to the central hub while that of the other projects upward, thus alining the contact faces oi the two rings so that they will properly cooperate with the same contact fingers. The hubs of the contact j rings are insulated from the shaft S (which is preferably of square section in that portion j of it which is embraced by the hubs oi the contact rings) byan insulating sleeve 8 and j the hubs are insulated from each other by insulating washers s. The hubs are clamped between a collar 8 and the washer 8 both on the shaft S, means of the cap screw 8, the hubs being insulated from these parts by the washers s The shaft S works in a bearing 1) carried by the uper framework H of the reversing switch, t e portion of the shaft S which enl tore the bearing being, of course, of round one of the outer standards?) section. A crank C is keyed or pinned to the to the lines leading to the translating device lower end of the shaft S, the other end of this 'l, shown as a motor will be reversed, thereby crank being connected with the plunger 1) working in axial openin s in the two electrol the translating device.

magnets M and M T .e crank is pivotally While I have shown the reversing switch connected to the lunger between the magactuated by two clectro-magnets which may nets. The shaft and the contact rin s carhe energized from a suitable source of ourried thereby may be readily removed from rent by means of any suitable type of switch, the bearing 6 by merely removing or releasit is evident that the reversing switch could ing the crank C, whichmay be readily acbe operated by hand by simply eliminating complished after the collar 0 has been rethe electro-magnets M and M and attaching moved from the lower end of the said shaft. a suitable crank for rotating the shaft S by Each of these electro-magnets consists of a hand. I have also illustrated the reversing magnetizing coil m mounted upon a tube 'm switch in a form which would be adapted to of non-magnetic material, whic lies between reversing the direction of current flow in a and b and one single translating device or motor T, such for of the central standards If to which the instance, as the armature A thereof. It is framework H is secured, these standards proevident that the direction of current flow jecting from the base B of the switch. through two or more translating devices These standards as well as the base B are of might be controlled by the single pair of magnetic material and form a portion of the electro-magnets M and M by simfply exniagnetic circuits of the electro-ma nets. tending the shaft S and duplicating or each The standards I) and b are detachab y setranslating device the contact rings R and cured to the base B by the screws 6 so that R carried thereby, at the same time extendthe outer standards 6 and b may be readil t ing the insulating plates 1) and D and dudetached to permit the removal of the coils plicating the contact fingers carried by them. of the electro-magnets without disturbing The contact lingers in each group may be reversing the direction of current flow through the other parts of the apparatus. It will be more or less than-three.

readily understood that the position of the lelaim as my inventionplunger will be shifted by energizing one 1. In a reversing switch the combination or the other of theelectro-magnets M or M of a rotatable shaft, a collar, or shoulder on and, that this in turn will sbft the position said shaft, segmental contact rings carried of the contact rings it and it, carried by the by and insulated from said shaft above said shaft S. l t will aiso be readily seen that by shoulder, a bearing for said shaft below said detaching the crank from the plunger, the shoulder, and a crank removably attached to said shaft below said bearing, the parts being so disposed that the shaft and contact rings which it carries may be readily removed when said crank is detached from said shaft.

2. In a magnetically op rated reversing switch the combination of a shaft, contact rings carried thereby, a crank attached to said shaft, a plunger common to two electrothrough one of the tubes m .ln Figs. 1 and 2 of the drawings, the parts are shown in the relative positions which they would occupy, were the electro-niagnet M energized. it will be seen from inspeci tion of Fig. I that in this position the contact l ring it" connects the contact lingers F and l ring R connects the I plunger may be readily removed endwise/ F, while the contact magnets attached to the free end of said contact fingers F and F When the eleccrank, said electromagnets being open at tro-magnet M is energized the position of the plunger 7) will be shifted and will rotate the shaft S so that contact ring R will connect both ends of their bore so that by detaching the crank from said plunger the plunger may be readily removed.

fingers F and F while contact ring i will .3. In a magnetically operated reversing connect contact fingers F and F. in either sw1tch the combination of a base plate of position, the contact ring R is always in contact with the finger F and contact ring R is always in contact with the diametrically opposite finger F.

f the two wires :0 and y from a source of current-su ply be connected to two of the diametrically opposite fingers, such, for instance, as 1* and F and two wires leading to the translating device be connected to the diametrically opposite fingers F and F, as shown in Fig. 4, and if the position of the contact rings is shifted by one of the electromagnets, the connections of the supply lines magnetic material, two standards of magnetic material extending at right angles to said base plate to either side of its middle point, a detachable standard of magnetic material at either end of said base plate, and two electro-magnets each mounted upon a central tube, the end of said tubes being supported in the standards carried b said base plate. \\'lu.-'rel)yeitl1er of said electromagnets may be removed by detaching the corresponding end standard without disturb ing other parts.

1 4. In a reverslng switch,

the combination of a rotatable shaft, contact rings carried themby, and four groups of tact fingers, stahonary 0611mm, fingers b two plates of insulating m with each ether and with shaft.

stationary c01 cope-rming With said rings, said sing carried by Mel-mi, pmauei send Yet-amide Si led at Cleveland, Ohio, this 16 day of Apri, 1906.

ARTHUR C. EASTWOOD.

Witnesses I O. FmTLE, C. W. JOMSTOOK. 

